Hey guys, not exactly new but I don't post a whole lot mostly cuz I'm still learning about the AR system, but I could use some advice.  I just sold my 24" RRA, shot awsome, but didn't have a use for it anymore.  Now I'm getting ready to put together a more compact (CQB I guess you could call it) AR.

I've been looking at different part/accessories for weeks, and with my limited experience I just don't know what will and what won't work together.  Here is what I am after (basically) can anyone tell me what will/won't work?

Lower will be Stag, and upper will be Bushmaster.  < This won't change.

-14.5" barrel that would accept bayonet (Vortex flash suppressor would be nice, but I don't know if I can order a 14.5" barrel with one already on).

-Eotech, prefer the model with AA's (552 i think) but the problem I forsee is it is too long to mount w/ a BUIS.  What are my options around this?

-BUIS- probably a 40L

-would like a front flilp up iron sight so it does not interfere w/ the Eotech, but I don't know the best way to go about doing this.

-what did I miss?

All help is very much appreciated.  

there is a whole forum dedicated to dealers that will help you with what you are looking for.


gds_enterprise offers bushmaster uppers so you could talk to them about getting a assembled upper with a vortex perm attatched to be kosher

I already have a supplier for uppers, I'm just looking for suggestions on setups.

Didn't mean for this to go under optics, please move.